The Washington critic., 1887-12-17
epetial Notices.
tN|S,punE WATER.


The following Is the Official report of the SUI
pcrintondont and engineers of the water works
of Atlanta, Ga, datcl Nov. 20, 1887;
Honorable Board Water Commissioners
GEHrLENEs- According TO resolution adopted
by your honorable body ut the last meeting
have made u thorough and complete test of the
ers @ 80 hSr Sny eapsay T6s Saseri en snr
5000 900 gallons In twenty.four hours. Mr.
Clayton. city, enqneer Mr. Haynes. assistant city
MIR. q. u Kcndrlck In behalf Of the Newark Filter
ing Company, conducted the test MIR Travis
the engineer In charge Of the pumping station,
the. engine and pumps. Tho large H,0Q00o0
GALLON engine was run through the whole test.
THE small 1000 900 gallon engine y usually
day is over and run through tho neht.)
IN, Mr Clayton and myself decided that run oi
the % Twelve ters should s % bo thSroshiy @ V washed AL
would be a good and sufficient test. Tho test
was started az 1880 a. IN. and closed at 1880 D.
m. The water being delivered by the pumps was
estimated from the revolutions Of tho engine and
was accepted ns the quantity being filtered.
Readings were taken from the engine counter
and tho height OF water In the clear water basin
at the expiration Of every hour The theoretical
pumping capacity OF each pumping cylinder n
aareyou,lon Of the engine tdednctlng the cubical
20 o51000 gallons, which give for the four
pumps tOi 220.l0OO gallons at each revolution.
In figuring the duty the friction Is left out MS u
compensation for loss in actual pumpage, caused
from loss of probable leakage by punger and
close OF valves. The pumps were In good condi-
tion, and the per cent. Of loss allowed may, or
may not be sufficient. This would be hard to
determine accurately. but as the head Of 800 feet
on the pumps give 130 pounds pressure the
valves close very quickly, and therefore, the
percentage Of loss at this point Is small, The
clearwater basin holds $50, ,Oi0 gallons with the
water up TO the 0foot inark-1 400 gallons per
inch of height. The character of the water be-
ing discharged from the filter was such that
small objects at the bottom Of the basin could
be plainly seen through 20 feet of water; and at
the close OF the test the bottom was plainly seen
by moonlight.
There are twelve filters ten feet in diameter
thirteen feet high. At the opening Of the test
ten filters were put in service, but after half an
hour one filter was cut out and nine were used
lthe water In the basin gaining on the puinpsl;
then nine filters were used for nine and a.half
hours: then twelve filters were put in and run
for seven and a-half hours, and eleven for the
closing half hour. making an average OF eleven
flters In use throughout the IL hours. The re-
suit obtained shows that the filters, In the pres.
cnt condition OF the wuter, have "A capacity of
tiltcring l,2i4,O0i gallons in "a hours.
A tabuatcd statement of each hours work Is
attached to the report under the following heads:
Time, height of water In basin, reading of engine
counter, revolutions of engine, gallons q water
pumped, equivalent to number OF gallons In
2i hours, number Of filters In use. The footing
of these columns give the following:
Gallons.
Water at close of test three inches
:, higher than nt opening. ....,..... 4,4sS
Capacity Of one filter, iii Of above
not III use.......... 1Io.6B6
Result in IL hours. ..... ...........2,l0S,OO
Capacity Of IL filters In "a hours I'D ,2l6,OOI
II, NJ. CLAYTON, city Engineer.
q. u. HAYNES, Assistant City Engineer.
WM. q. RICHARDS, Supt. Water Works.